@d3fc/d3fc-series/src/multiBase.js

A collection of components for rendering data series to SVG and canvas, including line, bar, OHLC, candlestick and more

import {scaleIdentity} from 'd3-scale';
import createBase from './base';

export default () => {

    let series = [];
    let mapping = (d) => d;
    let key = (_, i) => i;

    const multi = createBase({
        decorate: () => {},
        xScale: scaleIdentity(),
        yScale: scaleIdentity()
    });

    multi.xValues = () => series.map(s => s.xValues())
        .reduce((a, b) => a.concat(b));
    multi.yValues = () => series.map(s => s.yValues())
        .reduce((a, b) => a.concat(b));
    multi.mapping = (...args) => {
        if (!args.length) {
            return mapping;
        }
        mapping = args[0];
        return multi;
    };
    multi.key = (...args) => {
        if (!args.length) {
            return key;
        }
        key = args[0];
        return multi;
    };
    multi.series = (...args) => {
        if (!args.length) {
            return series;
        }
        series = args[0];
        return multi;
    };

    return multi;
};